Feat: refactoring process

[JPeer264]

Breaking:

• processJs -> process.js
• processCss -> process.css
• removed process
• each process function does just have one return parameter (before the second was true on success)

Feat:

• process.auto
• process.html
• process.any
• Promise support

Fix:

• merged options are now correct

[coveralls]

Coverage decreased (-0.8%) to 96.4% when pulling b532a7b on feat/new-structure into e0e728e on master.